21111880

素因数分解:

$2^3\times 5^1\times {\mathrm{83}}^1\times {\mathrm{6359}}^1$

素因数の和:6453

約数の個数: 32

約数和(自身を含む): 48081600

約数和(自身を除く): 26969720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 83, 166, 332, 415, 664, 830, 1660, 3320, 6359, 12718, 25436, 31795, 50872, 63590, 127180, 254360, 527797, 1055594, 2111188, 2638985, 4222376, 5277970, 10555940, 21111880]

約数ペア:

[(1, 21111880), (2, 10555940), (4, 5277970), (5, 4222376), (8, 2638985), (10, 2111188), (20, 1055594), (40, 527797), (83, 254360), (166, 127180), (332, 63590), (415, 50872), (664, 31795), (830, 25436), (1660, 12718), (3320, 6359)]